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Introduction to p Block Elements

Which one of ...

Question

Which one of the compounds cannot decolourise an acidified solution of $K M n O_{4}$ ?

S O_{2}

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F e C l_{3}

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H_{2} O_{2}

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F e S O_{4}

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Solution

The correct option is B $F e C l_{3}$
When $K M n O_{4}$ get reduced, it decolourises.
In $F e C l_{3}$ , $F e$ is in highest oxidation state.
Therefore, it can not be oxidized and hence, cannot reduce $K M n O_{4}$ .

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Similar questions

Which one of the following does not decolourize an acidified $K M n O_{4}$ solution.

K M n O_{4}

H_{2} O_{2}

K M n O_{4}

K M n O_{4}

15

K M n O_{4}

S O_{2}

S O_{2}

(F e S_{2})

X

S O_{2}

X

10

H_{2} O_{2}

10

100

K M n O_{4}

H_{2} S O_{4}

K M n O_{4}

K = 39, M n = 55

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